There are a lot of celebrities who have been in and out of rehab for various reasons. The list of celebrities who have undergone or still undergoing rehab treatment is notable. Below are some of the list of celebrities who’ve been to rehab.

John Belushi was in and out numerous times and   ultimately died of cocaine overdose. Another famous celebrity is Robin Williams whose addictions include alcoholism and cocaine previously. When he started to drink again, he went back to rehab   right away. Ben Affleck has alcoholism but has successfully completed rehabilitation and remains a Hollywood star.

Robert Downey Jr. is once addicted to heroine and   cocaine.  Nevertheless, he has continued to become a successful actor after his rehabilitation. Marshall Mathers, popularly known   as Eminem has sleep medications addiction and has been doing hiatus since his rehabilitation. Whitney Houston was addicted to marijuana, cocaine, prescription drugs and analgesic. Has been to rehab a couple of times and reportedly stopped using them. Nicole Ritchie has eating disorders and heroine addiction. She has completed rehabilitation and is now starting a family with Joel Madden of the rock band Good Charlotte. Drew Barrymore was highly addicted to alcohol and drugs and has attempted suicide before she turned 13. She went to rehab and has turned her life around ever since.